I have one of my oldest memories from childhood. There I am siting in front of big russian made TV and playing PONG. You know that tennis game with ball two sticks and rope at the middle. Don't know about my age back then.

Later there was NES or Sega games...

There are good titles that were already adapted. Just need to remake them.

Hitman- hours of slowly and silent walking to kill one guard. After 35 minutes its done. Lets move for another guy.

Max Payne - lets just take Commando and show that movie in slow motion.

Blood Rayne - just show live execution of Uwe Bowl.

I like feeling when your characters are humane. For example they can bleed become tired, show emotions, choose their own way.. And so on.

When you can establish relations withs NPC's, when game world shows trust to you. Things like these effects our emotions and makes us feel good :]

Naturally graphics and sounds and mechanics are important too..